Concrete form clamp



Feb. 1, 1944. a H s'TRo- EN 2,340,439

CONCRETE FORM CLAMP Filed Jan. 9, 1945 IQYENTOR.

ragga.

offa concrete form.

this.

Patented Feb. 1, 1944 eenager FORM CLAMP I George H. ttroben, Detroit,Mich. Le alise???- 9, .9 sea libmer:

" Claims. (o1..25 131' T is i ention, r latsii .c mbin fmans e concreteforms.

All sorts of clamps have been proposed and tused for clampingtth eplanks or boa'rds together ,for the concrete form into which thelpour isfor constructing concrete walls for. buildings,

.f aeratin tom s ewin Fig, 1 is a da v EigiZ is a horiizontal crosssection of same. Fig. 3 is a perspective of one o-f'jthemovable clampingbrackets th normal type."

Fig. 4 is a perspective of 'on'e'of the supple-r mentary clampingbrackets which is used to messa es we wer me rea i liig 5 isa verticalcross section through a portion of the concrete form one ofthese lastmentionedclamps is usedf' .Fig. .6 is a verticalsection of amodification embodying ajbolt"fortightenlngin place of a ""vlvedge foraia'st'ening device. ",fThe'concretef formfis built up of boards ofplanks Fwhi'ch ordinarily willbe vertically ar- 'Qranged but; or course,could be laid horizontally. f Boltejdjto 7 these planks is a pluralityof metal stra s 2; 'Thesestraps'rriay bebolted to the outside of theplanks at the top; bottom andmid portions or at any other desirablelocation on the plank Each'strap'ha'sa center portion bumped out as at 3to form a recessor socket to receive the tongue of the angle arm bracketdesignated 4. One end of the strap is offset outwardly as at 5; theother end 6 of the strap projects outwardly to form a tenon which fitsinto the tenon groove formed by theofiset portion 5. The bolts are shownat 1 in Fig. 2,

The problem is how to tie, support and clamp the timbers in place thatsupport the planks in a concrete term. This I accomplish by boltingthese simple straps on each of the planks. These straps with their endsformed into a tenon and a tenon groove arrangement efiectively line theplanks up in the desired plane. Each strap v "in niber has a tonguereceiving "socket 3; Ordihat-11y it willnotb'e necessary to'llse aclampf'on each plankbjecause the'tenon' and tenon groov"arrangementof'the strapsholds the 'planks in line and it is onlynecessary to tie th eplanksi'and the timbers 'together'every'third orfourth" plank.

Hnbe, one 'of'th'e" brackets :will be dropped into thetongue socket, asshown i'njFigf l. This'a'ngle arrn bracket has a tongue portion 4 ato'neend and fa "turned up portion 8' at the other end, "which I shalldesignateithe turned up' lug. {Ifhe web it rests in horizontal positionwhen the bracket in place. As'will readily be seen from Fig-J 1, thehbrijzontal beainorjtirn ber J 9* can be dropped on these removablebrackets";*fThehthe wedges ll may be driven in place" between thevertical lug 8 and the'outsideface of-the timber or beam.

" tightly draws the plankto which the strap 1 is j attachedagainst'thebeam and the "strap and :Plank' t e d w the ad oinin plai ksg ""As already explained, it will not be necessary to use the 'br'ackets"excepteverythreeor f four iplanks. However, for clearness of showing-I have shown the straps located on every other plank at the top ofFig. 1. It may be found, how- "ever] that after the normal clamps have"been tightened, one OllTlOIe of the boards arestill out of line or outof *plane' or loose; To meet this "situation I use another form ofbracket shown'in N Fig. 4;" Here the angle armbracket is formed just asthe normal bracket butit has a loop form {of tongue at the socket and"designated 4d; This tongue may be slipped in the tongue socket 3 frombeneath and, consequently,-can be mounted ori-the job after the timberhas been setin-place and tightened. This form of bracket, of "course,

is of no value to hold, the timber in place initially 40" the timber orbeam has beenset and clamped in because it woulddrop out of'the'socket,but after placefifany part- 0f the'strlictureis'outof true It will beseen from this description that this I clamping arrangement is extremelysimple. The straps attachedto the boards or planks do not ,project anyconsiderable distance above the sure face of the plank and,consequently, the planks can easily be stacked when not in use. The

boards may be set up and matched together with a minimum of trouble.Then the simple angle iron clamps may be dropped in place, the timbersset and then wedged into place simply by driving wedges which can bemade of wood or metal, 1. as desired. Then if it is found that any ofthe .structure is out of line or out of true, all that ;is necessary isto place the supplemental angle 2,s4o,4eo 71'?! angle brackets eachhaving at one end aturned- I :forms made up of planks, cross beams ortimbers comprising, a plurality of straps, each strap ar- :ranged to beset across a plank, the ends of the :straps arranged to match'togetherin interlocking position and Z-shaped brackets interlocking with thestrap for supporting a beam or timber and provided with means for tyingthe beam or timber to the plank.

2. Clamping and aligning means for concrete forms made up of planks,cross beams or timber comprising, a plurality of straps, each straparranged to be set across a plank, the ends of the "straps arranged tomatch together in interlocking position and .means interlocking with,the

"strap for supporting a beam or timber and tying the beam or timber tothe plank comprising removable stamped metal Z-shaped brackets removablyinterlocking with the straps and wedge driven between the brackets andthe timber.

the structure together.

down tongue adapted to be slipped into said tongue socket of a strap, aturned-up outer end forming an upstanding lug and a fasteningmemher thatcan be driven in between the outside face of the timber and the lug totie the s ructure together.

5. Clamping and aligning means for con rete forms made up of planks andcross beams or timbers comprising .a plurality of straps, each strapprovided with a bumped-out center portion forming a tongue socket andarranged to be set across a plank, means interlocking with the strap forsupporting a beam or timber and tying the beam or timber to the plankcomprising rea movable brackets each having at one end a turned-downtongue adapted to be slipped into said tongue socket of a strap, aturned-up outer end forming an upstanding lug and a fastening memberthat can be driven in between the outside face-of the timber and the lugto tie 6. Clamping and aligning means for concrete forms made up ofplanks and cross beams or timbers comprising, a plurality of straps,each strap provided with a bumped-out center portion forming a tonguesocket and arranged to be set 7 across a plank; means interlocking withthe strap 3.'Clamping and aligning means for concrete iorms'made up ofplanks and cross beams or timber comprising, a plurality of straps, eachstrap arranged to be set across, a plank, the ends ,of the strapsarranged to match together in interlocking position and meansinterlocking with the strap for supporting a beam or timber and tyingthe beam or timber to the plank compris- ;ing angle arm brackets havingeach a turned- .down tongue arranged to removably interlock with a strapon the plank and a turned-up lug ,at the opposite end of the bracketwith, an inter- Lconnecting web portion arranged to support the timberor beam and a fastening member in betion forming a tongue socket andarranged to be set across a plank, the ends of the straps arranged tomatch together in interlocking" position and means interlocking with thestraps for supporting a beam or timber and tying the beam xor timber tothe plank comprising removable for supporting a beam or timber and tyingthe beam or timber to'the plank comprising removable brackets eachhaving at one end a turneddown tongue adapted to be slipped into saidtongue socket of a strap, a turned-up outer end forming anupstandinglug, a wedge that can be driven in between'the outside face ofthe timber and the lug to tie the structure together, a supplementalbracket having at one end an upturned lug and at the other end aloop-like tongue member wherebythe said supplemental bracket may heslipped in place on the under side of the beam after the beam has beenset and tightened,

for the purposeof correcting irregularities in the form, together with afastening member for driving in between the upturned lug of thesupplemental bracket and the-beam;

7. Clamping and aligning means for concrete forms made up of planks andcross beams or timbers comprising a plurality of straps, each strapprovided with a bumped-out center portion forming a tongue socket andarranged to be set across a plank, means interlocking with the strap forsupporting a beam or timber and tying the beam or timber to the plankcomprising removable brackets each having at one end a turned-downtongue adapted to be slipped'into said tongue jsocket of a strap, aturned-up outer and forming an upstanding lug and a fastening memberbetween the outside face of the timber and the lug to tie the structuretogether.

GEORGE H. S'IROBEN.

